Chromium (total)
Americas Catch The Farm
Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 1.000 ppb | 3 | 2 | ND - 2.10 ppb |
| 2022 | 0.233 ppb | 3 | 1 | ND - 0.700 ppb |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 100 ppb
The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-08-28 | 180829-038IN | ND |
| 2021-09-14 | IN-210915-005 | ND |
| 2021-09-21 | IN-210922-001 | 2.10 ppb |
| 2021-10-26 | IN-211027-019 | 0.900 ppb |
| 2022-02-22 | IN-220223-029 | ND |
| 2022-04-26 | IN-220427-150 | 0.700 ppb |
| 2022-08-23 | IN-220824-006 | ND |
| 2023-10-31 | IN-231101-013 | ND |